1. The Development, Decision, and Reaction

3. FDR died on April 12, 1945 FDR died on April 12, 1945 Truman becomes President Truman becomes President Knew nothing about Manhattan Project Knew nothing about Manhattan Project Favors use of bomb to end war quickly Favors use of bomb to end war quickly Interim Committee Interim Committee Gov’t leaders, officials, & scientists discuss usage Gov’t leaders, officials, & scientists discuss usage Recommend usage Recommend usage Many scientists who had worked on project oppose usage Many scientists who had worked on project oppose usage German threat defeated German threat defeated http://www.atomicarchive.com/Movies/Movie8.shtml

4. B-29 Bomber B-29 Bomber Dropped “Little Boy” on Hiroshima Dropped “Little Boy” on Hiroshima Piloted by Colonel Paul Tibbets Piloted by Colonel Paul Tibbets

5. Why Chosen? Why Chosen? Major port, military HQ, war industries Major port, military HQ, war industries Untouched by previous bombing raids Untouched by previous bombing raids Urban area – hoped to break will of Japanese Urban area – hoped to break will of Japanese Population Population Military – 43,000 Military – 43,000 Civilian – 285,000 Civilian – 285,000

6. August 6 th – 8:15AM August 6 th – 8:15AM Little Boy Explodes Little Boy Explodes Results Results Thousands Killed Instantly Thousands Killed Instantly 70,000 Killed 70,000 Killed 20 US POWs 20 US POWs 70,000 Injured 70,000 Injured By end of 1945 By end of 1945 140,000 Dead (20,000 military) 140,000 Dead (20,000 military) In 5 years time In 5 years time 200,000 dead 200,000 dead

9. No Japanese Surrender No Japanese Surrender Why Chosen? Why Chosen? Large Seaport in Southern Japan Large Seaport in Southern Japan Wartime Industries Wartime Industries Manufactured torpedoes used at Pearl Harbor Manufactured torpedoes used at Pearl Harbor Actually secondary target Actually secondary target Weather poor at primary Weather poor at primary

11. August 9 th – 11:01AM August 9 th – 11:01AM Fat Man Explodes Fat Man Explodes Results Results Thousands Killed Instantly Thousands Killed Instantly 40,000 Killed 40,000 Killed 60,000 Injured 60,000 Injured Less Damage than Hiroshima – due to geography Less Damage than Hiroshima – due to geography By end of 1945 By end of 1945 70,000 Dead 70,000 Dead Final Total Dead = 140,000 Final Total Dead = 140,000

14. VJ Day – August 14 th 1945 VJ Day – August 14 th 1945 Japanese Surrender Japanese Surrender http://www.history.com/media.do?action=clip&id=mf949_vjday_49

16. September 2, 1945 September 2, 1945 Official signing of surrender Official signing of surrender USS Missouri USS Missouri One of ships attacked at Pearl Harbor One of ships attacked at Pearl Harbor

17. Arms Race / Cold War Arms Race / Cold War Health of Japanese Health of Japanese Others Want/Get the Bomb Others Want/Get the Bomb

18. After watching the reenactment of the bombing of Hiroshima and seeing the effects of the A-Bombs, do you still believe your decision about what to do with the bombs is correct? Why or Why not? After watching the reenactment of the bombing of Hiroshima and seeing the effects of the A-Bombs, do you still believe your decision about what to do with the bombs is correct? Why or Why not?